One-component thermosetting coating composition

US6025438A · kind A · utility

Assignee

• A. RAYMOND & Cie · FR

Inventors

• Rudolf Hinterwaldner · Munich, DE
• Hans-Jurgen Lesser · Rheinfelden (Baden), DE
• Axel Bottcher · Wesel, DE
• Ullrich Grundke · Duisburg, DE
• Klaus-Peter Liebetanz · Duisburg, DE

Key dates

• Filing date: Jan 15, 1997
• Grant date: Feb 15, 2000
• Expiry date: Jan 15, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31529
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A one-component thermosetting coating composition containing of one or more chemically setting binders, at least one curing or crosslinking agent, and one or more toughening substances, the composition being semisolid and tackfree at temperatures <50.degree. C., wherein the chemically setting binders have an average molecular weight (M.sub.w) of between 500 and 250,000, a melting point of more than 50.degree. C., a glass transition temperature of more than 20.degree. C. and cure fully at temperatures in the range from 80 to 250.degree. C. and in doing so reach at least 10% of the final strength within 15 seconds, wherein the binders have epoxide groups or ethylenically unsaturated groups as reactive groups, wherein the toughening substance is selected from the group consisting of butadiene-acrylonitrile copolymers having terminal carboxyl, epoxide, amino or ethylenically unsaturated groups or are highly branched aliphatic hydrocarbon epoxides, wherein at the least one curing or crosslinking agent is a metal complex of the general formula M(SR).sub.x B.sub.z in which M=a metal ion, PA1 L=a ligand, PA1 SR=an acid radical ion, PA1 B=a Lewis Base, PA1 x=a number from 1 to 8 and PA1 z=a…